Drehscheibeantrieb - Entwicklung

Handmuster

As a result of the feedback from a model railway forum (Czech model railway forum) I have decided to speed up the development of a universal turntable drive for small turntables. It is meant to use the same modular design as is used for the wooden turntable. The only difference is only that instead of the top table with the rails only two wires and a screw.  Further improvement shall allow for easy mounting of serial product from manufactures such as PECO, Fleischmann, etc.

And of course a few 3D drawings from the design stage and a handmade prototype.

Endprototyp

So the mechanical bit has been put together, milled and assembled to a working piece. Changing the rail polarity is made mechanically after a 180 degree turn. The rail potential is transferred to the rail by the means of two carbons sitting on springs. The sensor of zero position is built-in and the interface to the turntable is with a M2 thread approx. 10 long.  The whole assembly can be blued or screwed on the bottom of a turntable pit. When screwed four M3 crews with the length of at least 25 mm are needed. For gluing a bit of second glue shall do the trick.

And a few pictures from the now milled prototype. The pictures show the four screws sunk in the top part to allow for attachment of the drive to the bottom of a turntable pit.

Endprodukt

Es hatte ein bisschen Verspätung in der Entwicklung aufgrund von anderen Dingen und anderen Konstruktionen, die ichmachen musste, aber schließlich sind die finale Kleinlichkeiten fertig und wir sind bereit die Produktion zu rollen. Die letzte Änderung war der neue Entwurf der Schnittstelle zwischen den Antrieb und die Drehscheibe. Das wurde von einem einfachen M2 Schraub zu einer leeren Rohre mit dem Durchmesser 6 mm gewechselt. Das Nachteil dieser Lösung ist, dass man damit die Drähte für die Schienenpotential im Inneren der Rohre haben kann.